A move for Chelsea’s David Luiz is among the deals Arsenal are working on as they bid to sign a centre-back.

Luiz, who is is under contract until 2021, did not take part in first-team training with Chelsea on Wednesday.

The 32-year-old was present at their Cobham base and did not refuse to do anything – but was not involved with the main group.

Arsenal open the new Premier League season at Newcastle on Sunday, while Chelsea visit Manchester United.